机械毕业设计英文外文翻译120电牵引采煤机的开关磁阻电动机.docx

机械毕业设计英文外文翻译120电牵引采煤机的开关磁阻电动机.docx

《机械毕业设计英文外文翻译120电牵引采煤机的开关磁阻电动机.docx》由会员分享，可在线阅读，更多相关《机械毕业设计英文外文翻译120电牵引采煤机的开关磁阻电动机.docx（14页珍藏版）》请在冰点文库上搜索。

机械毕业设计英文外文翻译120电牵引采煤机的开关磁阻电动机

SwitchedReluctanceMotorsDriveforthe

ElectricalTractioninShearer

Abstract—ThepaperpresentedthedoubleSwitchedReluctancemotorsparalleldrivesystemfortheelectricaltractioninshearer.Thesystemcomponents,suchastheSwitchedReluctancemotor,themaincircuitofthepowerconverterandthecontroller,weredescribed.Thecontrolstrategiesoftheclosed-looprotorspeedcontrolwithPIalgorithmandbalancingthedistributionoftheloadswithfuzzylogicalgorithmweregiven.Thetestsresultswerealsopresented.ItisshownthattherelativedeviationoftheaverageDCsuppliedcurrentofthepowerconverterintheSwitchedReluctancemotor1andintheSwitchedReluctancemotor2iswithin±10%

Keywords-switchedreluctance;motorcontrol;shearer;coalmine;electricaldrive

I.INTRODUCTION

Theundergroundsurroundingsofthecoalminesareveryexecrable.Oneside,itisthemoist,highdustandinflammablesurroundings.Ontheotherside,thespaceofroadwayislimitedsinceitisnecessarytosavetheinvestmentofexploitingcoalminessothatitisdifficulttomaintaintheequipments.Inthemoderncoalmines,theautomatizationequipmentscouldbeusedwidely.The

faultsoftheautomatizationequipmentscouldaffecttheproductionandthebenefitofthecoalmines.Thesheareristheminingequipmentthatcoalcouldbecutfromthecoalwall.Thetraditionalshearerwasdrivenbythehydrostatictransmissionsystem.Thefaultratioofthehydrostatictransmissionsystemishighsincethefluidinhydrostatictransmissionsystemcouldbepollutedeasily.Thefaultsofthehydrostatictransmissionsystemcouldaffecttheproductionandthebenefitofthecoalminesdirectly.Thefaultratioofthemotordrivesystemislowerthanthatofthehydrostatictransmissionsystem,butitisdifficulttocoolthemotordrivesystemincoalminessincethemotordrivesystemshouldbeinstalledwithintheflameproofenclosureforsafetyprotection.Themotordrivesystemisalsooneofthepivotalpartsintheautomatizationequipments.Thedevelopmentofthenoveltypesofthemotordrivesystemhadbeenattachedimportancetobythecoalmines.TheSwitchedReluctancemotordrivecouldbecomethemainequipmentsforadjustablespeedelectricaldrivesystemincoalmines[1],becauseithasthehighoperationalreliabilityandthefaulttolerantability[2].TheSwitchedReluctancemotordrivemadeupofthedouble-salientpoleSwitchedReluctancemotor,theunipolarpowerconverterandthecontrollerisfirminthemotorandinthepowerconverter.Thereisnobrushstructureinthemotorandnofaultofambipolarpowerconverterinthepowerconverter[3][4].TheSwitchedReluctancemotordrivecouldbeoperatedattheconditionoflackedphasesfaultdependedontheindependenceofeachphaseinthemotorandthepowerconverter[5].Thereisnowindingintherotorsothatthereisnocopperlossinthelossandthereisonlylittleironlossintherotor.Itiseasytocoolthemotorsinceitisnotnecessarytocooltherotor.TheshearerdrivenbytheSwitchedReluctancemotordrivehadbeendeveloped.Thepaperpresentedthedevelopedprototype.

II.SYSTEMCOMPONENTS

ThedevelopedSwitchedReluctancemotorsdrivefortheelectricaltractioninshearerisatypeofthedoubleSwitchedReluctancemotorsparalleldrivesystem.ThesystemismadeupoftwoSwitchedReluctancemotors,acontrolboxinstalledthepowerconverterandthecontroller.TheadoptedtwoSwitchedReluctancemotorsareallthree-phase12/8structureSwitchedReluctancemotor,whichwereshowninFigure1.ThetwoSwitchedReluctancemotorswerepackingbytheexplosion-proofenclosure,respectively.Theratedoutputpowerofonemotoris40KWattherotorspeed1155r/min,andtheadjustablespeedrangeisfrom100r/minto1500r/min.

Figure1.Photographofthetwothree-phase12/8structureSwitchedReluctancemotor

Thepowerconverterconsistsoftwothree-phaseasymmetricbridgepowerconverterinparallel.TheIGBTswereusedasthemainswitches.Three-phase380VACpowersourcewasrectificatedandsuppliedtothepowerconverter.ThemaincircuitofthepowerconverterwasshowninFigure2

Figure2.Maincircuitofthepowerconverter

.Inthecontroller,thereweretherotorpositiondetectioncircuit,thecommutationcircuit,thecurrentandvoltageprotectioncircuit,themainswitches’gatedrivercircuitandthedigitalcontrollerforrotorspeedclosed-loopandbalancingthedistributionoftheloads.

III.CONTROLSTRATEGY

ThetwoSwitchedReluctancemotorcouldalldrivetheshearerbythetransmissionoutfitinthesametractionguidewaysothattherotorspeedofthetwoSwitchedReluctancemotorscouldbesynchronized.

Theclosed-looprotorspeedcontrolofthedoubleSwitchedReluctancemotorsparalleldrivesystemcouldbeimplementedbyPIalgorithm.IntheSwitchedReluctancemotor1,thetriggeredsignalsofthemainswitchesinthepowerconverteraremodulatedbyPWMsignal,thecomparisonofthegivenrotorspeedandthepracticalrotorspeedaremadeandthedutyratioofPWMsignalareregulatedasfollows,

where,

isthegivenrotorspeed,

isthepracticalrotorspeed,

isthedifferenceoftherotorspeed,

istheincrementofthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atktime,

istheintegralcoefficient,

istheproportioncoefficient,ekisthedifferenceoftherotorspeedatktime,ek-1isthedifferenceoftherotorspeedatk-1time,D1（k）isthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atktime,andD1（k-1）isthedutyratioofPWMsignaloftheSwitchedReluctancemotor1atk-1time.TheoutputpoweroftheSwitchedReluctancemotordrivesystemisapproximatelyinproportiontotheaverageDCsuppliedcurrentofthepowerconverterasfollows,

where,P2istheoutputpoweroftheSwitchedReluctancemotordrivesystem,IinistheaverageDCsuppliedcurrentofthepowerconverter.

IntheSwitchedReluctancemotor2,thetriggeredsignalsofthemainswitchesinthepowerconverterarealsomodulatedbyPWMsignal.ThebalancingthedistributionoftheloadsbetweenthetwoSwitchedReluctancemotorscouldbeimplementedbyfuzzylogicalgorithm.Inthefuzzylogicregulator,therearetwoinputcontrolparameters,oneisthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotors,andtheotheristhevariationofthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotors.TheoutputcontrolparameteristheincrementofthedutyratioofthePWMsignaloftheSwitchedReluctancemotor2.TheblockdiagramofthedoubleSwitchedReluctancemotorsparalleldrivesystemfortheelectricaltractioninshearerwasshowninFigure3.

Figure3.BlockdiagramofthedoubleSwitchedReluctancemotorsparalleldrivesystemfortheelectricaltractioninshearer

ThedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotorsatthemomentoftiis

where,Iin1isthepracticalaverageDCsuppliedcurrentofthepowerconverterintheSwitchedReluctancemotor1atthemomentofti,Iin2isthepracticalaverageDCsuppliedcurrentofthepowerconverterintheSwitchedReluctancemotor2atthemomentofti.

ThevariationofthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotorsatthemomentoftiis

where,ei-1isthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotorsatthemomentofti-1.

ThedutyratioofthePWMsignaloftheSwitchedReluctancemotor2atthemomentoftiis

where,ΔD2（i）istheincrementofthedutyratioofthePWMsignaloftheSwitchedReluctancemotor2atthemomentoftiandD2（i-1）isthedutyratioofthePWMsignaloftheSwitchedReluctancemotor2atthemomentofti-1.

Thefuzzylogicalgorithmcouldbeexpressedasfollows,

where,EisthefuzzysetofthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotors,ECisthefuzzysetofthevariationofthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotors,andUisthefuzzysetoftheincrementofthedutyratioofthePWMsignaloftheSwitchedReluctancemotor2.

ThecontinuousdeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotorscouldbechangedintothediscreteamountattheinterval[-5,+5],basedontheequationsasfollows,

ThecontinuousvariationofthedeviationoftheaverageDCsuppliedcurrentofthepowerconverterbetweenthetwoSwitchedReluctancemotorscouldalsobechangedintothediscreteamountattheinterval[-5,+5],basedontheequationsasfollows,

ThediscreteincrementofthedutyratioofPWMsignaloftheSwitchedReluctancemotor2attheinterval[-5,+5]couldbechangedintothecontinuousamountattheinterval[-1.0%,+1.0%],basedontheequationsasfollows,

Thereisadecisionformsofthefuzzylogicalgorithmbasedontheaboveprinciples,whichwasstoredintheprogrammestoragecellofthecontroller.

WhilethedifferenceofthedistributionoftheloadsbetweenthetwoSwitchedReluctancemotorscouldbegot,thedutyratioofPWMsignaloftheSwitchedReluctancemotor2willberegulatedbasedonthedecisionformsofthefuzzylogicalgorithmandthedistributionoftheloadsbetweenthetwoSwitchedReluctancemotorscouldbebalanced.

IV.TESTEDRESULTS

ThedevelopeddoubleSwitchedReluctancemotorsparalleldrivesystemproto